I am currently working on a Coolpad 8150, a Chinese phone running Android 2.3.7. It is connected to T-Mobile (in the United States) and can place calls successfully. However, it is stuck on 2G. I have been lead to believe the phone supports 3G, though I may be mistaken. How may I further pursue this issue?

When I scan for networks, I only see networks marked 2G, like T-Mobile (2G).

In status, it appears I am still marked as using the China Mobile network operator.